Motorola MC74ACT151M, MC74ACT151N, MC74ACT151DR2, MC74ACT151D, MC74AC151D Datasheet

1 of 8 Decoder/Demultiplexer

The MC74AC151/74ACT151 is a high-speed 8-input digital multiplexer. It provides, in one package, the ability to select one line of data from up to eight sources. The MC74AC151/74ACT151 can be used as a universal function generator to generate any logic function of four variables. Both true and complementary outputs are provided.

•Outputs Source/Sink 24 mA

•′ACT151 Has TTL Compatible Inputs

VCC

I4

I5

I6

I7

S0

S1

S2

16

15

14

13

12

11

10

9

PIN NAMES

I0±I7

Data Inputs

S

0±S2

Select Inputs

E

Enable Input

1

2

3

4

5

6

7

8

Z

Data Output

I3

I2

I1

I0

Z

Z

E

GND

Z

Inverted Data Output

TRUTH TABLE

	Inputs			Outputs
E	S2	S1	S0	Z	Z
H	X	X	X	H	L
L	L	L	L	I0	I0
L	L	L	H	I1	I1
L	L	H	L	I2	I2
L	L	H	H	I3	I3
L	H	L	L	I4	I4
L	H	L	H	I5	I5
L	H	H	L	I6	I6
L	H	H	H	I7	I7

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

MC74AC151

MC74ACT151

1-OF-8

DECODER/DEMULTIPLEXER

N SUFFIX

CASE 648-08

PLASTIC

D SUFFIX

CASE 751B-05

PLASTIC

LOGIC SYMBOL

S0

E I0

I1 I

2 I3 I

4 I5 I6 I7

S1

S2

Z

Z

FACT DATA

5-1

MC74AC151 MC74ACT151

FUNCTIONAL DESCRIPTION

The MC74AC151/74ACT151 is a logic implementation of a single pole, 8-position switch with the switch position controlled by the state of three Select inputs, S0, S1, S2. Both true and complementary outputs are provided. The Enable input (E) is active LOW. When it is not activated, the complementary output is HIGH and the true output is LOW regardless of all other inputs. The logic function provided at the output is:

Z = E•(I0•S0•S1•S2+I1•S0•S1•S2+

I2•S0•S1•S2+I3•S0•S1•S2+

I4•S0•S1•S2+I5•S0•S1•S2+

I6•S0•S1•S2+I7•S0•S1•S2)

The MC74AC151/74ACT151 provides the ability, in one package, to select from eight sources of data or control information. By proper manipulation of the inputs, the MC74AC151/74ACT151 can provide any logic function of four variables and its complement.

	LOGIC DIAGRAM
I0	I1	I2	I3	I4	I5	I6	I7
S2
S1
S0
E

Please note that this diagram is provided
only for the understanding of logic
operations and should not be used to	Z	Z
estimate propagation delays.

MAXIMUM RATINGS*

Symbol	Parameter	Value	Unit
VCC	DC Supply Voltage (Referenced to GND)	±0.5 to +7.0	V
Vin	DC Input Voltage (Referenced to GND)	±0.5 to VCC +0.5	V
Vout	DC Output Voltage (Referenced to GND)	±0.5 to VCC +0.5	V
Iin	DC Input Current, per Pin	±20	mA
Iout	DC Output Sink/Source Current, per Pin	±50	mA
ICC	DC VCC or GND Current per Output Pin	±50	mA
Tstg	Storage Temperature	±65 to +150	°C

*Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended Operating Conditions.

FACT DATA

5-2